Restore proper compression and sealing with Namura NA-40015R piston rings, designed specifically for 70.95 mm Namura pistons used in select Yamaha applications. These replacement rings help maintain efficient combustion, support consistent engine performance, and reduce the risk of blow-by caused by worn or damaged rings.
Manufactured by Namura and intended for use with Namura pistons only, these rings are a direct replacement component for compatible piston assemblies. Confirm the piston model, engine application, and required ring specifications before installation to ensure proper fitment. The manufacturer part number is NA-40015R, and the vendor part number is 186-4015R.
For reliable results, inspect the piston, cylinder, ring grooves, and cylinder wall condition during installation. Follow the engine manufacturer’s service procedures for ring orientation, end-gap measurement, lubrication, and break-in. Proper preparation and installation help promote dependable sealing and long service life.
Features:
- Size: 70.95 mm piston ring set
- Application: Designed for select Yamaha engine applications
- Compatibility: For use with Namura pistons only
- Brand: Namura
- Manufacturer Part Number: NA-40015R
- Vendor Part Number: 186-4015R
- Function: Helps restore compression and reduce combustion blow-by
- Installation: Verify piston and engine fitment before installation